# Linear Programming Dual

**Tutor description**

Every linear programming problem has associated with it another linear programming problem and that the two problems have such a close relationship that whenever one problem is solved, the other is solved as well. The original LPP is called the primal problem and the associated LPP is called the dual problem. Together they are called a \dual pair" (primal + dual) in the sense that the dual of the dual will again be the primal.

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